袁黃曆法新書

袁黃，（1533-1606）袁家祖居浙江嘉興陶莊, 是明代重要思想家

袁黃是「文理全才」的人物。他是明朝著名的農學家、水利學家及曆法學家。譬如，他所著《曆法新書》涉及46種曆法，有歲差總數積算、五緯總數積算、推天正冬至五星自行限度、求第一東西差、求太陽食甚定分、求日月出入帶食所見分秒、求朔望交會約率、四平方求弦術、太白黃道南北緯度、黃道南北各像內外星經緯度等，共150多種求算方法，學問深邃。

《曆法新書》"時差加減立成"中的小數並不是六十進制(分,秒), 而是百進制. 很可能受印度或伊斯蘭學者影響

李亮 Arabic astronomical tables in China

明史卷31

明史卷三十七志第十三曆七回回曆法

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